[Bug 58061] [FL Studio] When holding CTRL to zoom in the playlist, it also scrolls vertically - possible regression

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58061

--- Comment #7 from Sagawa  ---
That sounds great. Thanks for testing.

In WM_MOUSEWHEEL messages of the Windows API, the wheel rotation amount is
encoded in the high-order word of wparam, while the low-order word contains key
press flags. The original code added the two wparam values together,
inadvertently merging the wheel delta with key state data and risking
inaccurate scroll behavior. The patch resolves this by extracting only the
wheel delta from each wparam.

Lastly, please don't forget to update the status as RESOLVED FIXED.